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CVE

CVE-2019-18677

An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended ch

An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to.

MEDIUM · CVSS 6.1 EPSS 0.04214
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-352Cross-Site Request Forgery (CSRF)
▤

Affected Products & Versions

6
squid-cache squid>= 2.0 and <= 2.7
squid-cache squid>= 3.0 and <= 3.5.28
squid-cache squid>= 4.0 and <= 4.8
squid-cache squidall versions
canonical ubuntu linuxall versions
fedoraproject fedoraall versions
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Nov 2019 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
⚑

Vendor Advisories

9
suse-csafopenSUSE-SU-2024:11403-1
suse-csafSUSE-SU-2020:14460-1
rhsaRHSA-2020:4743Moderate
suse-csafSUSE-SU-2020:0661-1
usnUSN-4213-1
🔗

References & Sources

11
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.squid-cache.org/Advisories/SQUID-2019_9.txtThird Party Advisory
http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-e5f1813a674848dde570f7920873e1071f96e0b4.patchRelease Notes
http://www.squid-cache.org/Versions/v4/changesets/squid-4-36492033ea4097821a4f7ff3ddcb971fbd1e8ba0.patchRelease Notes
https://bugzilla.suse.com/show_bug.cgi?id=1156328Issue TrackingThird Party Advisory
https://github.com/squid-cache/squid/pull/427PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00011.htmlThird Party Advisory
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